Attached are the schematics for the signal conditioning and control electronics for the LENR apparatus I'm building. There are three subcircuits: inlet/outlet temperature monitoring, fan airflow control, and a temperature controller that drives a programmable power supply. The last circuit assumes an IR thermometer or a high temp thermocouple controller with 0-20 ma current loop output. This is an industry standard. All the circuits have been simulated and appear to operate correctly. Depending on your particular setup some circuits may be of interest.
Jeff